Hydraulic system and a method for operating a hydraulic system
AssigneeDanfoss Power Solutions ApS
InventorsHenrik Hjorth, Erik Christensen
Life of this patent
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Abstract
A hydraulic system (1) is provided comprising a group of at least two valves (2a, 2b, 2c) connected to a bus (8), each of said valves (2a, 2b, 2c) comprising a primary memory (9a, 9b, 9c) for storing a set of parameters of the valve (2a, 2b, 2c). The service work of such a hydraulic system should be facilitated. To this end each valve (2a, 2b, 2c) comprises a secondary memory (10a, 10b, 10c) storing said set of parameters of a different valve (2b, 2c, 2a) of said group.
Claims21
A hydraulic system comprising:
- two or more groups of valves, each group of valves comprising at least two valves connected to a bus for communicating therebetween, each of said at least two valves in each group comprising a primary memory for storing a set of parameters of the valve and a secondary memory storing a set of parameters of a different valve of the same group, and
- wherein a back-up valve of said at least two valves is configured to send a check sum value of the secondary memory of said back-up valve to a primary valve of said at least two valves during a start phase of the hydraulic system or during a start phase of said at least two valves, and
- wherein, if the check sum value of the secondary memory of said back-up valve is not equal to a check sum value of the primary memory of said primary valve, said primary valve is configured to update the primary memory of said primary valve with said set of parameters of the secondary memory of said back-up valve or said back-up valve is configured to update the secondary memory of said back-up valve with said set of parameters of said primary memory of said primary valve.
A method for operating a hydraulic system comprising two or more groups of valves, the method comprising the steps of:
- providing at least two valves connected to a bus in each group of valves,
- wherein each of the at least two valves in each group comprises a primary memory for storing a set of parameters for the valve and a secondary memory for storing a set of parameters of a different valve of the same group,
- storing the set of parameters for each valve in the primary memory,
- storing the set of parameters of a different valve of the same group in the secondary memory of each valve,
- sending, by a back-up valve of said at least two valves, a check sum value of the secondary memory of said back-up valve to a primary valve of said at least two valves during a start phase of the hydraulic system or during a start phase of said at least two valves, and
- if the check sum value of said secondary memory of said back-up valve is not equal to a check sum value of the primary memory of said primary valve, updating the primary memory of said primary valve with said set of parameters of said secondary memory of said back-up valve or updating the secondary memory of said back-up valve with said set of parameters of the primary memory of said primary valve.
A method for operating a hydraulic system comprising two or more groups of valves, the method comprising the steps of:
- providing at least two valves connected to a bus in each group of valves,
- wherein each of the at least two valves in each group comprises a primary memory for storing a set of parameters for the valve and a secondary memory for storing a set of parameters of a different valve of the same group,
- storing the set of parameters for each valve in the primary memory,
- storing the set of parameters of a different valve of the same group in the secondary memory of each valve,
- downloading said set of parameters from the secondary memory of one of the valves into the primary memory of another one of the valves that is a defect valve or of a spare part valve for replacing a defect valve or a spare part valve, and
- calculating and comparing a check sum value of a memory area of said primary memory of the spare part valve and a check sum value of a memory area of said secondary memory with each other after the step of updating the primary memory of the spare part valve.
Dependencies are inferred from the claim text.